ST. LOUIS — The gunman who killed a student and teacher at a south St. Louis high school before police killed him Monday had about 600 rounds of ammunition inside the school and left behind handwritten notes about being a loner with no social life, which he called the perfect storm for a mass shooting, authorities said Tuesday. St. Louis Interim Police Chief Michael Sack read a passage to reporters Tuesday from a notebook belonging to 19-year-old Orlando Harris. Harris left the notebook in the car he drove to the school, Central Visual and Performing Arts High School. “I don’t have any friends…
